The "Save As" feature allows you to save the data under a different file name.  There is no "Save" option, as the data is saved throughout the experiment (which is why the name is required to begin an experiment), as well as any post-run changes to the data.  After using the "Save As" feature, the new name becomes the active file, while the original data is closed.

The "Save As Template" feature saves the experimental parameters of the current open data record to a setup template that can be called up to run additional experiments with these same parameters.